Well This is funny!!!

 So there is a fun article in the NY Times if you can access it. LINK. It has videos of actions called out below.

The story is about an elephant who has learned to use the hose. In a German zoo, the handlers wash the Indian Elephants daily. One day, an animal behavior expert watched and found that the handlers were washing all the elephants except Mary. When they get to Mary, they just give her the hose, and she washes herself.

The expert was very surprised but didn't think the elephants "learned" much. A hose is very much like a trunk and they assumed Mary understood that tool quickly. Elephants have been known to use tree leaves as flyswatters and other simple "tools". 

But then they saw another elephant totally prank (or screw with) Mary. While washing, a younger elephant learned how to kink the hose to shut off her water (or reduce to a trickle). It is the first time they have seen this type of play behavior in elephants. 

Fascinating.